Home / 1,421.85-2,132.91-448.10

Finding the Fourth Proportional to 1,421.85, 2,132.91 and 448.10

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Solution

The fourth proportional to 1,421.85, 2,132.91 and 448.10 is: 672.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.85 : 2,132.91 = 448.10 : x
  2. Step 2: Convert to fraction form
    1,421.85/2,132.91 = 448.10/x
  3. Step 3: Cross multiply
    1,421.85x = 2,132.91 × 448.10
  4. Step 4: Simplify right side
    1,421.85x = 955,756.97
  5. Step 5: Solve for x
    x = 955,756.97/1,421.85
  6. Step 6: Final answer
    x = 672.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.